LS PWM/STD Alternator & Sensor Pull-Up Controller

LS PWM & STD Alternator & Sensor Pull-Up Controller

This module does everything the standard LS PWM Alternator Controller does, plus it integrates common pull-up resistors required for external ECU sensors. It is designed to simplify wiring when running Holley or similar ECUs that rely on external pull-ups for certain inputs.

It allows you to:

• Run a PWM-controlled LS alternator without an ECU

• Or run a standard alternator excite

• And cleanly wire external sensors that require 5 V pull-up resistors, without adding inline resistors or messy splices

The unit generates the alternator control internally and provides regulated 5 V pull-ups for sensor inputs.

Ignition-switched operation. Power it with key-on 12 V and it handles the rest.

Designed and built in-house.

Features

• PWM LS alternator control (no ECU required)

• Standard alternator excite support

• Integrated 5 V pull-up resistors for external sensors

• Eliminates external inline resistors

• Clean, simplified wiring for Holley and similar ECUs

• Internal PWM signal generation

• Ignition-switched operation

• Interior mounting only (not waterproof)

Integrated Pull-Ups

Available internally:

• 2 × 5 V 10 kΩ pull-up

• 2 × 5 V 1 kΩ pull-up

• 1 × 5 V 2.2 kΩ pull-up

Suitable for:

• Flex fuel sensors

• Frequency-based sensors

• Hall-effect style inputs

• Any sensor requiring an external 5 V pull-up

Wiring Requirements

Basic supply:

• Ignition-switched 12 V

• Ground

• 5 V supply

Outputs / connections:

• LS PWM alternator control or standard alternator excite

• Dedicated sensor pull-up outputs as required

Simple, labelled connections. No resistor maths, no guesswork.

Specifications

• Alternator types:

  • LS PWM alternator

  • Standard alternator excite

• Pull-ups:

  • 5 V 10 kΩ ×2

  • 5 V 1 kΩ ×2

  • 5 V 2.2 kΩ ×1

• Control method: Internal PWM / excite

• Mounting: Interior only

• Warranty: 12 months